A mitochondrion is a small structure inside the cell, which has two membranes and a matrix. Chemical reactions occur in the membrane and the fluid is held in the matrix. It is the powerhouse of the cell because it supplies continuous energy to the cell. The number of mitochondria varies fro...
Cell Structure
1. Cell or Plasma Membrane Cell membrane 1. Living layer 2. Selectively permeable a. Controls the movement of material into and out of the cell 2. Cell Wall Cell wall (Plant Cell) A. Dead layer B. Found in plants, fungi, & bacteria C. Freely permeable D. Large empty spaces between ...